William M. Thomas
Black Canyon Road Bridge (San Diego County, California)
Design Engineer, 1913Open spandrel Concrete arch bridge over Santa Ysabel Creek on Black Canyon RoadOpen to traffic
Cottonwood Creek Bridge (Madera County, California)
Built 1914Concrete tee beam bridge over Cottonwood Creek on Road 28Open to traffic
Parks Bar Bridge (Yuba County, California)
Engineer, 1913Open-spandrel arch bridge over Yuba River on CA 20Replaced in 1993 and destroyed.
Rowdy Creek Bridge (Del Norte County, California)
Design Engineer, 1913Lost Concrete deck girder bridge over Rowdy Creek on Fred D. Haight DriveReplaced by new bridge